Editing Typewriter (section)

=== Typewriter erasers ===
[[File:Triumph_-_Typewriter_Eraser_1960.jpg|thumb|Triumph typewriter eraser (1960)]]
The traditional correction method involved the use of a special typewriter [[eraser]] made of [[hard rubber]] that contained an [[abrasive]] material. Some were thin, flat disks, pink or gray, approximately {{convert|2|in|mm}} in diameter by {{convert|1/8|in|mm}} thick, with a brush attached from the center, while others looked like pink pencils, with a sharpenable eraser at the "lead" end and a stiff nylon brush at the other end. Either way, these tools made possible erasure of individual typed letters. Business letters were typed on heavyweight, high-rag-content bond paper, not merely to provide a luxurious appearance, but also to stand up to erasure.<ref>{{Cite magazine |date=November 1947 |title=Rotating Typewriter Eraser |url=https://books.google.com/books?id=PeADAAAAMBAJ&pg=PA128 |magazine=Popular Mechanics |page=128 |access-date=2022-04-27}}</ref>

Typewriter eraser brushes were necessary for clearing eraser crumbs and paper dust, and using the brush properly was an important element of typewriting skill; if erasure detritus fell into the typewriter, a small buildup could cause the typebars to jam in their narrow supporting grooves.<ref>{{Cite web |title=Erasing History |url=https://www.historians.org/publications-and-directories/perspectives-on-history/may-2009/erasing-history |access-date=2022-04-27 |website=Perspectives on History {{!}} AHA}}</ref>